Important: This page is an educational routine catch-up planner for healthy children. It does not replace clinician judgment, local immunization rules, vaccine brand instructions, high-risk condition guidance, travel guidance, influenza planning, or COVID recommendations.
Enter documented dose dates in YYYY-MM-DD format, separated by commas. Example: 2024-01-10, 2024-03-10.
Calculator Inputs
Formula Used
Next eligible date = the latest of the required minimum age date, the previous valid dose date plus the minimum interval, and any final-dose rule.
Completion percentage = valid doses counted ÷ estimated series target × 100.
For Hib and PCV, the planner uses a simplified healthy-child age-based model because product brand, risk status, and earlier timing can change the exact path.
How to Use This Calculator
- Enter the child’s birth date and the date you are reviewing the record.
- Add each documented vaccine dose date in the correct vaccine box.
- Click the calculate button to build the catch-up summary above the form.
- Review doses marked due now, then check future minimum dates.
- Download the table as CSV or PDF for a visit note.
- Always confirm the plan with a pediatrician, clinic, or vaccine program.
Example Data Table
| Example child | DOB | Assessment date | Sample vaccine entries | Example outcome |
|---|---|---|---|---|
| Amina | 2024-01-15 | 2025-09-20 | HepB: 2024-01-15, 2024-02-20; DTaP: 2024-03-01, 2024-05-01, 2024-07-01; IPV: 2024-03-01, 2024-05-01; MMR: 2025-02-20 | HepB dose 3 due by rule, DTaP dose 4 due, IPV dose 3 due, MMR has 1 of 2 doses complete. |
Frequently Asked Questions
1. Does this restart a late vaccine series?
No. Catch-up schedules usually continue from valid earlier doses. A long delay does not usually mean the whole series starts over.
2. Why do some vaccines show future dates instead of due now?
The planner checks minimum spacing rules. If the last dose was too recent, the next dose must wait until the minimum interval is reached.
3. Why are Hib and PCV marked as simplified?
Those series depend heavily on age at earlier doses, product brand, and some medical conditions. This page estimates the healthy-child path only.
4. Can I use this for travel or immune-risk decisions?
No. Travel plans, immune compromise, splenic disease, and special-risk conditions can change timing, product choice, and dose totals.
5. What if I only know some of the vaccine dates?
Enter only documented dates. If records are incomplete, a clinic may need to verify history or decide whether repeat vaccination is safer.
6. Why is the final IPV dose sometimes later?
The final IPV dose often must be given at age 4 years or older and at least 6 months after the previous valid dose.
7. Does this planner handle influenza or COVID schedules?
No. Those schedules change more often and depend on season, product, age, and past history. Review current guidance separately.
8. Should I rely on this without medical review?
No. Use it to organize records and questions, then confirm the final recommendation with your pediatrician, nurse, or vaccine clinic.